According to an independent report by KPMG, "the people the BBC brought with them from London was the catalyst for change on the banks of the ship canal."
This report in "The Manchester Evening News" goes on to say....
"As of March 2015, there were more than 2,500 full time-equivalent employees based at the BBC’s Salford site - around 80pc of the corporation’s northern workforce and 13pc of those on its payroll nationally.
Around a third moved from London; a third are from Greater Manchester; and a third hail from elsewhere. It is thought around 10pc are from Salford."
Referring to The Media City site, the report says:-
"Some 80pc of workers in the city are in skilled and specialist jobs - including journalism, production management and digital and technical roles.
Between 2011 and 2014, there was a 75pc increase in employment in the creative industries in Salford."